In chemistry, containing equal numbers of moles of each component; describing solutions or reactions with equal molar amounts.
From Latin 'aequi-' (equal) plus 'mole' (the unit of chemical amount, coined in the early 1900s). The '-ar' suffix creates an adjective form. Similar to equimolal but more commonly used.
Equimolar mixtures are the bread and butter of chemical reactions—when you combine equimolar amounts of two chemicals, you can predict exactly what will be left over (or if nothing is left over), making the chemistry elegant and efficient.
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